Similar International Standards
ASTM C393 / C393M - 21ASTM International, USA
HighCurrent
Standard Test Method for Core Shear Properties of Sandwich Constructions by Beam Flexure
Covers the determination of core shear properties, directly equivalent to the bending/flexure test in IS 9307.
ASTM C297 / C297M - 16ASTM International, USA
HighCurrent
Standard Test Method for Flatwise Tensile Strength of Sandwich Constructions
Covers the flatwise tension test, which is one of the key mechanical tests detailed in IS 9307.
ASTM C273 / C273M - 18ASTM International, USA
HighCurrent
Standard Test Method for Shear Properties of Sandwich Core Materials
Provides methods for determining shear properties of the core, equivalent to the plate shear test in IS 9307.
EN 14509:2013CEN (European Committee for Standardization), Europe
MediumCurrent
Self-supporting double skin metal faced insulating panels (sandwich panels) - Factory made products - Specifications
A product specification standard that references and describes test methods similar to those in IS 9307 for product qualification.
Key Differences
≠IS 9307 is a single, consolidated standard covering multiple tests (flexure, tension, compression, shear, etc.), whereas ASTM standards are typically separated into individual documents for each specific test property (e.g., ASTM C297 for tension, ASTM C393 for flexure).
≠Standard atmospheric conditions for specimen conditioning differ. IS 9307 specifies 27 ± 2 °C and 65 ± 5% relative humidity, while the common ASTM condition is 23 ± 3 °C and 50 ± 10% RH, which can impact results for moisture-sensitive wood-based materials.
≠The method of specifying the loading rate can differ. For flatwise tension, IS 9307 specifies a rate such that failure occurs in 3 to 6 minutes, which is performance-based. ASTM C297 specifies a prescriptive constant crosshead speed of 0.5 mm/min.
≠IS 9307 is specifically titled for 'Wood-based' structural sandwich construction, implying its focus. ASTM standards are generally material-agnostic ('Sandwich Constructions') and are broadly applied to composites, polymers, and metals in addition to wood.
Key Similarities
≈The fundamental mechanical principles behind the tests, such as inducing specific stress states like flatwise tension, core shear, or flexural stress, are identical across IS 9307 and its international counterparts.
≈The physical test setups and geometries are conceptually the same. For instance, the flatwise tension test in both IS 9307 and ASTM C297 involves bonding loading blocks to the faces of a square specimen and applying a tensile load perpendicular to the faces.
≈The primary objective is the same: to determine the key physical and mechanical properties of the sandwich construction, such as core shear strength, flatwise tensile strength, and flexural stiffness, for use in design and quality control.
≈All standards require comprehensive reporting of test parameters, specimen details, failure modes, and calculated results to ensure the test is repeatable and the data is interpretable.